[swift-evolution] repeat loop enhancement

André Videla zephyz at me.com
Wed Dec 9 00:05:35 CST 2015

How about having a default implementation in the standard library for it? 
We avoid syntactic sugar and we allow for this very simple yet useful expression.
And we’ve seen solutions in this thread using autoclosurses and extensions

5.times {

or a function

repeat(4) {

all sound good to me.

- André

> On 09 Dec 2015, at 06:58, Chris Lattner via swift-evolution <swift-evolution at swift.org> wrote:
> On Dec 8, 2015, at 4:43 PM, Daniel Steinberg via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>> For me this comes up when teaching children or new programmers. (Perhaps not a valid use case)
> This is a very valid use case.
> FWIW, “repeat N {}” was originally designed and scoped into the Swift 2 implementation of the feature, but was cut due to schedule limitations.  There is precedent for this sort of feature in many teaching oriented languages (e.g. Logo).
> I’d say that the pro’s and con’s of this are:
> + Makes a simple case very simple, particularly important in teaching.
> + Even if you aren’t familiar with it, you can tell at first glance what the behavior is.
> - It is “just syntactic sugar”, which makes the language more complex.
> - It is a very narrow feature that is useful in few practical situations.
> -Chris
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